Carburetor



April 1, 1930.

A. N. BONDESEN CARBURETOR Filed Nov. 30, 1925 mij? dumm,

Eatented Apre 1,A 1930 PATENT OFFICE f AGE NIELS BONDESEN, 0F COIENHAGEN, DENMARK Application mea November so, v1925. serial No. 72,354.

The present invention relates to a carburetorfor motor cars, particularly 'for the Ford engine,in which various advantages in comparison with the hitherto known constructions are attained. Furthermore, the carburetor is simple in design, and ensures a great saving in fuel.

The carburetor is U-shaped, and the on branch lies up `against and alongside the exhaust pipe, towards whichfit has an elongated slot opposite the petrol inlet, so thatv the petrol sucked through. a nozzle in the carburetor pipe as well as the 'air in this pipe are heated by means of the heat from the exhaust pipe, being at the same time atomized.

In connection with the fuel throttle valve in the carburetor pipe in front of the supply pipe of the-engine, there isa valve for yregulating the supply of air for the petrol sucked into `the carburetor pipe, allowing an automaticallyiadjusted current'ot air corresponding tothe position of the throttle valve and the supply of fuel, thus allowing a careful mixture offuel. y j

The petrol drawn from the main tank is rstcarried to an intermediate tank, from which it is sucked into the carburetor pipe, and in which there is always collected suflicient petrolto start the engine and keep it running a short while, it being in this manner unnecessary to draw the petrol from the main tank. The engine is therefore easy to start and the usual vacuum tank eliminated.

The invention is illustrated in the accompanying drawing, where Fig. l, is a side view of the complete carburetor,

Fig. 2, a part of the lower branch ofthe carburetor showing the regulating means ar# ranged thereon,

Fig. 3, a top view ofthe carburetor,

Fig. 4, a longitudinal section of the air throttle valve on an enlarged scale, and

Fig. 5, a cross section through line A-B in Fig. 1, on an enlarged scale.

The U-shaped carburetor pipe 1 lies with the one branch la close up to and alongside the exhaust pipe 2, indicated with dotted lines, towards which it is provided with a somewhat elongated slot 3, through which the heat from the exhaust pipe 2 enters the .pipe 1a. Upon the opposite side o f the latter;l and attached to the dashboard 4 of the car-.or to any other suitable place, is an intermediate tank 5 to which the petrol from the main tank is' carried through a side tap 6. Within the in.-

'termediate tank 5 is lowered the vertical por'- tion of a bent pipe T, which at its lower end has slits 8 for the petrol, and near the pipe 6 a very small suction opening 9 for air from theupper part of the tank. The pipe 7 is fastened to a'iange 11 upon the tank 5 by. means oi' a nut 10, and immediately above this bent to a downward incline. The lower end of this pipe is secured vto an elbow l3by means ol" a nut 12, and this elbow enters a tap 14 on the carburetor pipe 1a provided with a nozzle. During the suction of the engine the petrol passes as a fine spray through this nozzle from the intermediate tank 5,' though this tank is situated higher than the main tank, as the upper chamber of the. tank is evacuated through the opening 9, and thus ,acts as a kind of vacuum tank.

The branch 1n of the carburetor pipe is con* tinued to form a slotted guide housing 15 for a partly conical valve body 1G, Fig. 3, which closes a corresponding aperture 17 within the branch 1a. The rear cylindrical portion ot the saidvalve body is hollow and contains a. coil spring 18, the one end ot which is attached to the end of an angle lever 19,

which enters the hollow portion of the-valve body through a slot 20. The rear wall ot the valve body' is provided with an air hole 21,

and at its rear end anv eye 22 for connection with a handle rod, not illustrated', by `means of which it is possible'to'closethe valve by hand when the engine is to be started, as the g spring 18 is then pressed together against the rod 19 without moving the-latter.

The opposite end of the rod 19 is connected to move with the angle shaped shaft 23 for the usual throttle valve 25 in the lower-car buretor branch 1b in front of the suction pipe 24. The throttle valve 25 can be turned by means of an arm 26 att-ached to the said shaft from the drivers seat. The shaft 23 may iu'r-l thermore be surrounded by a bearing 27 attached to any suitable rigid portion of the i engine.

It will be understood that simultaneously with the regulation of the throttle valve 25 to supply more or less fuel to the engine, the air valve body 16 is regulated, thus regulating the supply of air through the aperture 17 to the carburetor pipe to conform exactly with the quantity of fuel sucked into the engine; it is therefore possible by repeated trials to form the connection with the air valve in such a y manner that the engine can work with as weak a mixture as in any way possible. Partly for this reason, and partly on account of the great heating attained through the elongated slot 3 and the resulting atomizing, the engine consumes only a minimum of petrol during the driving.

As indicated in Fig. 3, there can be attached, within the branch 1a opposite the slot 3 and bent towards the exhaust pipe 2, a rail or tongue 28, against which the fuel mixture is thrown back before it returns through the pipe 1, 1l to the engine, and this further assists the atomizing and vaporization of the fuel.

Having now described my invention, what I claim is:

A petrol carburetor for internal combustion engines, comprising a U-shaped carburetor pipe having one branch for the inlet of fuel and air, provided with an elongated slot for arrangement against and alongside the exhaust pipe of the engine so that part of the surface of the pipe is exposed to the interior of the branch, an inlet jet for fuel opposite the slot, an inlet for air, a valve body to control said air inlet, the other branch of said pipe being arranged to be connected to the motor inlet manifold and being provided with a mixture throttle valve, said air valve and said mixture throttle valve being operatively connected together so that when the air and throttle valves are open m'otor suction draws fuel through the inlet as a fine spray and atomizes same and also draws in air which together with the fuel isheated due to the exposed surface of the exhaust pipe, the said interconnected valve body and throttle providinga means whereby the supply of air is regulated to conform with the consumption of fuel, and said branch having a baffle arranged therein opposite the elongated slot, and against which' baille the fuel impinges, thus being further atomized before passing through the carburetor pi e to the motor.

AAGE NIEL BONDESEN. 

